# Copyright (c) 2019 Manfred Moitzi
# License: MIT License
from typing import cast
import pytest
import ezdxf
from ezdxf.entities.idbuffer import LayerFilter
from ezdxf.lldxf.tagwriter import TagCollector, basic_tags_from_text

LAYERFILTER = """0
LAYER_FILTER
5
0
102
{ACAD_REACTORS
330
0
102
}
330
0
100
AcDbFilter
100
AcDbLayerFilter
"""


@pytest.fixture
def entity():
    return LayerFilter.from_text(LAYERFILTER)


def test_registered():
    from ezdxf.entities.factory import ENTITY_CLASSES

    assert "LAYER_FILTER" in ENTITY_CLASSES


def test_default_init():
    entity = LayerFilter()
    assert entity.dxftype() == "LAYER_FILTER"
    assert entity.dxf.handle is None
    assert entity.dxf.owner is None


def test_default_new():
    entity = LayerFilter.new(handle="ABBA", owner="0", dxfattribs={})
    assert len(entity.handles) == 0


def test_load_from_text(entity):
    assert len(entity.handles) == 0


def test_write_dxf():
    entity = LayerFilter.from_text(LAYERFILTER)
    result = TagCollector.dxftags(entity)
    expected = basic_tags_from_text(LAYERFILTER)
    assert result == expected


@pytest.fixture(scope="module")
def doc():
    return ezdxf.new("R2007")


def test_generic_field_list(doc):
    layers = doc.objects.new_entity("LAYER_FILTER", {})
    assert layers.dxftype() == "LAYER_FILTER"
    assert len(layers.handles) == 0


def test_set_get_field_list(doc):
    field_list = doc.objects.new_entity("LAYER_FILTER", {})
    assert field_list.dxftype() == "LAYER_FILTER"
    field_list.handles = ["FF", "EE", "DD"]
    handles = field_list.handles
    assert len(handles) == 3
    assert handles == ["FF", "EE", "DD"]

    handles.append("FFFF")
    assert handles[-1] == "FFFF"


def test_dxf_tags(doc):
    buffer = cast(LayerFilter, doc.objects.new_entity("LAYER_FILTER", {}))
    buffer.handles = ["FF", "EE", "DD", "CC"]
    tags = TagCollector.dxftags(buffer)[-4:]

    assert len(tags) == 4
    assert tags[0] == (330, "FF")
    assert tags[-1] == (330, "CC")


def test_clone(doc):
    layers = cast(LayerFilter, doc.objects.new_entity("LAYER_FILTER", {}))
    layers.handles = ["FF", "EE", "DD", "CC"]
    layers2 = cast(LayerFilter, layers.copy())
    layers2.handles[-1] = "ABCD"
    assert layers.handles[:-1] == layers2.handles[:-1]
    assert layers.handles[-1] != layers2.handles[-1]
